Abstract 551: Investigation of the antipoliferative effect of the Xylopia Aethiopicaextract in triple-negative breast cancer cells

Abstract Triple-negative breast cancer (TNBC) is the most aggressive subtype of breast cancer and has very limited treatment options. Xylopia Aethiopica (XA) is a common spice that is widely used in the regions of central and western Africa. It is known to have various pharmacological properties, one of which is anti-inflammatory activity. The anti-inflammatory effect may portend antiproliferative activity. We hypothesized that the extract of XA will exert antiproliferative activity against TNBC cells. The study aimed to establish the molecular mechanism underlying the antiproliferative activity of XA extract (XAE) against TNBC. The dried fruits of XA were crushed in a mixer and macerated using diethyl ether for 72 h. The macerate was subjected to vacuum and rotary evaporation to remove the organic solvent, and a stock solution was prepared in dimethyl sulfoxide (DMSO). Assessment of the efficacy of XAE was performed using serial dilutions (100 µg/ml, 50 µg/ml, 10 µg/ml, 5 µg/ml, and 1µg/ml) of the XAE stock solution, followed by in vitro testing against two TNBC cell lines (MDA-MB-231, and MDA-MB-468 cells). The cytotoxic effect of the XAE was then measured using the resazurin dye assay. XAE resulted in a concentration-dependent cell death in both cell lines. At the highest concentration (100 µg/ml), XAE induced cytotoxic cell death of 89% and 91% in MDAMB231 and MDAMB468 cells, respectively. This was consistent with IC50 values of 32. 95 ± 1. 32 µg/ml (MDAMB231) and 20. 83 ± 1. 05 µg/ml (MDAMB468). At the molecular level, western blot analysis of mitogenic markers associated with MAPK oncogenic signaling pathway demonstrated the inhibition of EGFR and AKT protein levels after a 48-h treatment. Acridine orange-ethidium bromide (AO/EB) staining showed a concentration-dependent induction of apoptosis in both cell lines. Flow cytometric analysis was performed to quantify the apoptotic cells. A significant increase of apoptotic cells was observed in treatment groups as compared to control after 72 h. Apoptotic induction was associated with increased p53 protein levels after 48 h treatment compared to control. The study results underscore the anticancer effects of XAE in TNBC cells mediated through induction of apoptosis. Citation Format: Shailvi Soni, Shail Rakesh Modi, Terrick Andey. Investigation of the antipoliferative effect of the Xylopia Aethiopicaextract in triple-negative breast cancer cells abstract. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts) ; 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84 (6Suppl): Abstract nr 551.